The proportions of these components depend on the hardness of the crayon. Shellack is not present in the greasy and soft crayons. Lithographic crayon is normally available in five different hardnesses. The lower the number, the greasier and the softer.The crayons are used to draw the image on a lithographic stone (apart from for eample tusche and lithographic drawing ink)

The litho pencil is not contained in wood, like ordinary pencils, but is wrapped in paper. If the point of the pencil is worn out, the pencil is partly "unwrapped" by removing some paper. The litho pencil shows the number of the hardness.

At present Korn seems to make only the cores of the pencil, without paper wrapping. In that case you can use the core-holder. It might be that the Korn cores are too long for the holder. You can break a core in two pieces.... We don't know how long the paper wrapped version is still available.